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https://www.readbyqxmd.com/read/28743328/performance-evaluation-of-membrane-based-septic-tank-and-its-reuse-potential-for-irrigating-crops
#1
Mehwish Khalid, Imran Hashmi, Sher Jamal Khan
  Membrane technology, being the most emerging wastewater treatment option, has gained substantial importance with the massive objective of the reuse potential of wastewater. Keeping this in view, the present study was conducted with the rationale to evaluate the performance efficiency of membrane-based septic tank (MBST), and its reuse perspective for irrigating crops. The septic tank was designed by submerging a woven fiber microfiltration membrane module to treat domestic wastewater. Three crops Triticum aestivum (wheat), Coriandrum sativum (coriander), and Mentha arvensis (mint) were selected to be irrigated with treated MBST effluent, untreated wastewater, and tap water (as a control) for comparative growth analysis...
August 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28738513/mitigation-of-nonpoint-source-pollution-in-rural-areas-from-control-to-synergies-of-multi-ecosystem-services
#2
Yonghong Wu, Junzhuo Liu, Renfang Shen, Bojie Fu
Nonpoint source (NPS) pollution produced by human activities in rural areas has induced excessive nutrient input into surface waters and the decline of water quality. The essence of NPS pollution is the transport of nutrients between soil and water. Traditional NPS pollution control strategies, however, are mainly based on the solid and liquid phases, with little focus on the bio-phase between water and soil. The pollutants produced from NPS can be regarded as a resource if recycled or reused in an appropriate way in the agricultural ecosystem...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28737443/fertirrigation-with-sugarcane-vinasse-foreseeing-potential-impacts-on-soil-and-water-resources-through-vinasse-characterization
#3
Lucas T Fuess, Isabella J Rodrigues, Marcelo L Garcia
This paper reports the characterization of the polluting potential of sugarcane vinasse, the main wastewater from ethanol production. Compositional data from vinasse samples collected from sugarcane biorefineries were used to predict negative effects on the soil, water resources and crops potentially associated with fertirrigation, the primary final destination of vinasse in Brazil. High risks of soil salinization were associated with the land disposal of vinasse, as evidenced by the high levels of total dissolved solids (TDS; >4,000 mg L(-1)) and electrical conductivity (>6...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28728973/sewer-mining-a-water-reuse-option-supporting-circular-economy-public-service-provision-and-entrepreneurship
#4
C Makropoulos, E Rozos, I Tsoukalas, A Plevri, G Karakatsanis, L Karagiannidis, E Makri, C Lioumis, C Noutsopoulos, D Mamais, C Rippis, E Lytras
Water scarcity, either due to increased urbanisation or climatic variability, has motivated societies to reduce pressure on water resources mainly by reducing water demand. However, this practice alone is not sufficient to guarantee the quality of life that high quality water services underpin, especially within a context of increased urbanisation. As such, the idea of water reuse has been gaining momentum for some time and has recently found a more general context within the idea of the Circular Economy. This paper is set within the context of an ongoing discussion between centralized and decentralized water reuse techniques and the investigation of trade-offs between efficiency and economic viability of reuse at different scales...
July 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28726711/the-use-of-constructed-wetlands-for-the-treatment-and-reuse-of-urban-wastewater-for-the-irrigation-of-two-warm-season-turfgrass-species-under-mediterranean-climatic-conditions
#5
Mario Licata, Teresa Tuttolomondo, Claudio Leto, Salvatore La Bella, Giuseppe Virga
Constructed wetlands (CWs) represent low-cost technology for the treatment and reuse of wastewater in urban areas. This study aimed to evaluate the pollutant removal efficiency of a CW system and to assess the effects of irrigation using treated urban wastewater on soil and on two warm-season turf species. The research was carried out in Sicily (Italy) on a pilot-scale horizontal subsurface flow system which was fed with treated urban wastewater following secondary treatment from an activated-sludge wastewater treatment plant...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726695/a-combined-reed-bed-freezing-bed-technology-for-septage-treatment-and-reuse-in-cold-climate-regions
#6
C Kinsley, K Kennedy, A Crolla
A combined reed bed-freezing bed (RB-FB) technology was effective at treating septage under Canadian climatic conditions over a 5-year period with average loading rates of 82-104 kg TS/m(2)/y. Varying hydraulic and solid loading rates as well as the increasing sludge cake with time had little to no effect on treatment efficiency, with almost complete removal of organic matter, solids, heavy metals and nutrients. Filtrate concentrations varied significantly between the freeze-thaw and growing seasons for many parameters, although the differences were not important from a treatment or reuse perspective with filtrate quality similar to a low to medium strength domestic wastewater...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28724250/reuse-water-exposure-duration-seasonality-and-treatment-affect-tissue-responses-in-a-model-fish
#7
B J Blunt, A Singh, L Wu, M Gamal El-Din, M Belosevic, K B Tierney
Partially remediated gray (reuse) water will likely find increasing use in a variety of applications owing to the increasing scarcity of freshwater. We aimed to determine if a model fish, the goldfish, could sense reuse water using olfaction (smell), and if 30min or 7d (acute) and 60d (sub-chronic) exposures would affect their olfactory responses to natural odorants. We examined olfaction as previous studies have found that numerous chemicals can impair the olfactory sense, which is critical to carrying out numerous life-sustaining behaviors from feeding to mating...
July 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28723084/mineral-reactions-in-shale-gas-reservoirs-barite-scale-formation-from-reusing-produced-water-as-hydraulic-fracturing-fluid
#8
Amelia N Paukert Vankeuren, J Alexandra Hakala, Karl Jarvis, Johnathan E Moore
Hydraulic fracturing for gas production is now ubiquitous in shale plays, but relatively little is known about shale-hydraulic fracturing fluid (HFF) reactions within the reservoir. To investigate reactions during the shut-in period of hydraulic fracturing, experiments were conducted flowing different HFFs through fractured Marcellus Shale cores at reservoir temperature and pressure (66(o)C, 20 MPa) for one week. Results indicate HFFs with hydrochloric acid cause substantial dissolution of carbonate minerals, as expected, increasing effective fracture volume (fracture volume + near-fracture matrix porosity) by 56-65%...
July 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28720107/reversible-bacterial-immobilization-based-on-the-salt-dependent-adhesion-of-the-bacterionanofiber-protein-ataa
#9
Shogo Yoshimoto, Yuki Ohara, Hajime Nakatani, Katsutoshi Hori
BACKGROUND: Immobilization of microbial cells is an important strategy for the efficient use of whole-cell catalysts because it simplifies product separation, enables the cell concentration to be increased, stabilizes enzymatic activity, and permits repeated or continuous biocatalyst use. However, conventional immobilization methods have practical limitations, such as limited mass transfer in the inner part of a gel, gel fragility, cell leakage from the support matrix, and adverse effects on cell viability and catalytic activity...
July 18, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28715751/sepiolite-nanoplatform-for-the-simultaneous-assembly-of-magnetite-and-zinc-oxide-nanoparticles-as-photocatalyst-for-improving-removal-of-organic-pollutants
#10
M Akkari, P Aranda, A Mayoral, M García-Hernández, A Ben Haj Amara, E Ruiz-Hitzky
Novel ternary ZnO/Fe3O4-sepiolite nanostructured materials were developed in a two-step procedure based on the incorporation of ZnO nanoparticles on a substrate composed by magnetite nanoparticles previously assembled to the sepiolite fibrous silicate (Fe3O4-sepiolite). The structural and morphological characterization shows that both, ZnO and Fe3O4 nanoparticles, were homogeneously dispersed on the surface of sepiolite. Therefore, the resulting material is characterized as a multifunctional nanoplatform simultaneously providing magnetic and photoactive properties...
June 29, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28715742/development-of-high-performance-supercapacitor-electrode-derived-from-sugar-industry-spent-wash-waste
#11
Ashesh Mahto, Rajeev Gupta, Krishna Kanta Ghara, Divesh N Srivastava, Pratyush Maiti, Kalpana D, Paul Zavala-Revira, R Meena, S K Nataraj
This study aims at developing supercapacitor materials from sugar and distillery industry wastes, thereby mediating waste disposal problem through reuse. In a two-step process, biomethanated spent wash (BMSW) was acid treated to produce solid waste sludge and waste water with significantly reduced total organic carbon (TOC) and biological oxygen demand (BOD) content. Further, waste sludge was directly calcined in presence of activating agent ZnCl2 in inert atmosphere resulting in high surface area (730-900m(2)g(-1)) carbon of unique hexagonal morphology...
June 23, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28709107/efficient-bacterial-inactivation-with-z-scheme-agi-bi2moo6-under-visible-light-irradiation
#12
Jialiang Liang, Fuyang Liu, Jun Deng, Mian Li, Meiping Tong
A novel Z-scheme AgI/Bi2MoO6 hybrid photocatalyst was fabricated via a solvothermal-precipitation approach to disinfect bacteria in water. Powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopic (SEM) equipped with energy-dispersive X-ray spectroscopy (EDX), high resolution transmission electron microscope (HRTEM), UV-vis diffuse reflectance spectra (DRS), as well as photoluminescence spectra (PL) were employed to characterize the fabricated photocatalyst. Due to the stronger redox potential and better separation of charge carriers induced by the Z-scheme structure, the optimal synthesized AgI/Bi2MoO6 exhibited excellent disinfection activity towards both Gram-negative strain Escherichia coli (E...
July 6, 2017: Water Research
https://www.readbyqxmd.com/read/28709094/fit-for-purpose-wastewater-treatment-conceptualization-to-development-of-decision-support-tool-i
#13
Gyan Chhipi-Shrestha, Kasun Hewage, Rehan Sadiq
This article is the first in a series of two papers. Paper I focuses on model conceptualization and development, and Paper II in the series focuses on model validation and implementation. The amount of water reuse has been increasing across the globe. Wastewater can be treated based on the intended end use of reclaimed water. Fit-for-purpose wastewater treatment (WWT) simultaneously considers intended end use, economic viability, and environmental sustainability. WWT technologies differ mainly in terms of treatment efficiency, cost, energy use, and associated carbon emissions...
July 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28708611/upflow-anaerobic-sludge-blanket-and-aerated-constructed-wetlands-for-swine-wastewater-treatment-a-pilot-study
#14
F Masi, A Rizzo, N Martinuzzi, S D Wallace, D Van Oirschot, P Salazzari, E Meers, R Bresciani
Swine wastewater management is often affected by two main issues: a too high volume for optimal reuse as a fertilizer and a too high strength for an economically sustainable treatment by classical solutions. Hence, an innovative scheme has been tested to treat swine wastewater, combining a low cost anaerobic reactor, upflow anaerobic sludge blanket (UASB), with intensified constructed wetlands (aerated CWs) in a pilot scale experimental study. The swine wastewater described in this paper is produced by a swine production facility situated in North Italy...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28708117/solar-or-uva-visible-photocatalytic-ozonation-of-water-contaminants
#15
REVIEW
Fernando J Beltrán, Ana Rey
An incipient advanced oxidation process, solar photocatalytic ozonation (SPO), is reviewed in this paper with the aim of clarifying the importance of this process as a more sustainable water technology to remove priority or emerging contaminants from water. The synergism between ozonation and photocatalytic oxidation is well known to increase the oxidation rate of water contaminants, but this has mainly been studied in photocatalytic ozonation systems with lamps of different radiation wavelength, especially of ultraviolet nature (UVC, UVB, UVA)...
July 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28705506/fabrication-of-novel-chitosan-pan-magnetic-zsm-5-zeolite-coated-sponges-for-absorption-of-oil-from-water-surfaces
#16
Saman Samadi, Shabnam Sharif Yazd, Hossein Abdoli, Pooya Jafari, Majid Aliabadi
In the present study, the chitosan (bottom layer)/polyacrylonitrile (top layer, PAN) nanofibers were coated on the sponge surface. The synthesized magnetic Fe3O4- ZSM-5 nanozeolites have been loaded into the chitosan/PAN nanofibers to increase the performance of nanofibers toward absorption of lubricating oil, motor oil and pump oil from water surfaces. scanning electron microscope (SEM), Transmission electron microscope (TEM) and X-ray diffraction (XRD) analysis were used to characterize the synthesized nanozeolites...
July 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28704061/acid-base-polymeric-foams-for-the-adsorption-of-micro-oil-droplets-from-industrial-effluents
#17
Pavani Cherukupally, Edgar J Acosta, Juan P Hinestroza, Amy M Bilton, Chul B Park
Separation of toxic organic pollutants from industrial effluents is a great environmental challenge. Herein, an acid-base engineered foam is employed for separation of micro-oil droplets from an aqueous solution. In acidic or basic environments, acid-base polymers acquire surface charge due to protonation or dissociation of surface active functional groups. This property is invoked to adsorb crude oil microdroplets from water using polyester polyurethane (PESPU) foam. The physicochemical surface properties of the foam were characterized using X-ray photoelectron spectroscopy, inverse gas chromatography, electrokinetic analysis, and micro-computed tomography...
July 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28700973/fit-for-purpose-wastewater-treatment-testing-to-implementation-of-decision-support-tool-ii
#18
Gyan Chhipi-Shrestha, Kasun Hewage, Rehan Sadiq
This paper is the second in a series of two papers. In Paper I, a decision support tool (DST), FitWater, was developed for evaluating the potential of wastewater treatment (WWT) trains for various water reuse applications. In the present paper, the proposed DST has been tested and implemented. FitWater has been tested with several existing WWT plants in Canada and the USA, demonstrating FitWater's effectiveness in estimating life cycle cost (LCC), health risk, and energy use. FitWater has also been implemented in a newly planned neighbourhood in the Okanagan Valley (BC, Canada) by developing 12 alternative WWT trains for water reuse in lawn and public parks irrigation...
July 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28698514/disinfection-of-the-water-borne-pathogens-escherichia-coli-and-staphylococcus-aureus-by-solar-photocatalysis-using-sonochemically-synthesized-reusable-ag-zno-core-shell-nanoparticles
#19
Sourav Das, Neha Ranjana, Ananyo Jyoti Misra, Mrutyunjay Suar, Amrita Mishra, Ashok J Tamhankar, Cecilia Stålsby Lundborg, Suraj K Tripathy
Water borne pathogens present a threat to human health and their disinfection from water poses a challenge, prompting the search for newer methods and newer materials. Disinfection of the Gram-negative bacterium Escherichia coli and the Gram-positive coccal bacterium Staphylococcus aureus in an aqueous matrix was achieved within 60 and 90 min, respectively, at 35 °C using solar-photocatalysis mediated by sonochemically synthesized Ag@ZnO core-shell nanoparticles. The efficiency of the process increased with the increase in temperature and at 55 °C the disinfection for the two bacteria could be achieved in 45 and 60 min, respectively...
July 10, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28693674/the-imperative-for-regenerative-agriculture
#20
Christopher J Rhodes
A review is made of the current state of agriculture, emphasising issues of soil erosion and dependence on fossil fuels, in regard to achieving food security for a relentlessly enlarging global population. Soil has been described as "the fragile, living skin of the Earth", and yet both its aliveness and fragility have all too often been ignored in the expansion of agriculture across the face of the globe. Since it is a pivotal component in a global nexus of soil-water-air-energy, how we treat the soil can impact massively on climate change - with either beneficial or detrimental consequences, depending on whether the soil is preserved or degraded...
March 1, 2017: Science Progress
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